Saturn V from Arkansas [Estes #2157]

Discussion in 'Scale' started by Crawf56, Feb 2, 2019.

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  1. Mar 7, 2019 #151

    Crawf56

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    The 'hook' is for the parachute orientation. Does not mention the antennae in the instructions. But adding a second hook to duplicate the antennae is a good idea.
     
  2. Mar 9, 2019 #152

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    Attaching the Launch Lugs. They have a slight offset, to clear the wraps. I am using a 1/4" diameter launch rod to make sure they are aligned.

    m_IMG_4059small.jpg
     
  3. Mar 9, 2019 #153

    Crawf56

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    And another quick assembly pic, just for fun:

    m_IMG_4058small.jpg
     
  4. Mar 9, 2019 #154

    aerostadt

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    Nice Looking model!!
     
  5. Mar 9, 2019 #155

    Crawf56

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    A few observations:

    SCRAP PARTS
    Don't throw anything away. The instructions are often telling you to use scrap material for construction.

    FIN/FAIRING STRENGTH
    I have been surprised how strong the Fin & Fairing design seems to be (used 5 minute epoxy). Will see how flight test goes. o_O

    FOAM SAFE CA
    Very mixed results. Worked good sometimes; sometimes not.

    ESTES INSTRUCTIONS
    Very, very good.
     
  6. Mar 10, 2019 #156

    Crawf56

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    Using some 5 minute epoxy with microballoons to fill gaps.

    m_IMG_4060small.jpg
     
  7. Mar 10, 2019 #157

    Crawf56

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    Using Testors spray enamel Flat White for my base coat.

    m_IMG_4061small.jpg
     
  8. Mar 10, 2019 #158

    Crawf56

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    And throwing a little paint on the Saturn V. For the Main Body, I held it in the center, and painted the top third and bottom third. Then painted the middle. The 3rd stage was not in place during the painting.

    I applied two coats, being careful not to spray so much paint that it ran.

    m_IMG_4062small.jpg
     
  9. Mar 10, 2019 #159

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    x
     

    Attached Files:

    Last edited: Mar 10, 2019
  10. Mar 10, 2019 #160

    Crawf56

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    Below is an RC model of a German WW1 observation aircraft. This was my DFW C.V.

    After all the work, it never made a complete circuit of the RC field. :(

    Lesson: Flight test a model as soon as you are able, prior to putting on scale details. I will do some painting, because it is easier to do before some parts are permanently assembled.

    m_DFW 1 (2)small.jpg


    m_DFW 2 (2)small.jpg
     
  11. Mar 10, 2019 #161

    Crawf56

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    Masking the top of the 3rd Stage.

    m_IMG_4063small.jpg
     
  12. Mar 10, 2019 #162

    Crawf56

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    Testors enamel paints: Aluminum and Flat Black.

    m_IMG_4064small.jpg
     
  13. Mar 10, 2019 #163

    Crawf56

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    The Flat Black caused the sprayed Flat White to blend a little. Will need a second coat.

    m_IMG_4066small.jpg
     
  14. Mar 10, 2019 #164

    Crawf56

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    The lip on the conical wrap gave an edge for me to paint against (with a brush). The whole thing was previously spray painted Flat White, and the Aluminum/silver was brush-painted by hand.

    m_IMG_4065small.jpg
     
  15. Mar 10, 2019 #165

    Crawf56

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    While I had the Aluminum paint out, I decided to do some work on the Fins and Fairings. Note that I did some painting on the inside of the Main Body Tube, to help protect it.

    m_IMG_4067small.jpg
     
  16. Mar 10, 2019 #166

    Crawf56

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    Ok, time to work on the Tower Jet. Here are the instructions; gets a little odd, because Estes shows it being built upside-down.

    m_IMG_4070small.jpg
     
  17. Mar 10, 2019 #167

    Crawf56

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    And here are the parts.

    m_IMG_4069small.jpg
     
  18. Mar 10, 2019 #168

    Crawf56

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    And the nozzles are little. Get the tweezers.

    There was quite a bit of flash. Those snips were absolutely helpful (got at Hobby Lobby).

    m_IMG_4071small.jpg
     
  19. Mar 10, 2019 #169

    Crawf56

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    My plan is to keep the Tower Jet on the Saturn V at all times. So, it has to be strong, and that means epoxy.

    Using epoxy means time to set (at least 10 minutes). Which means I must think about how I build.

    The instructions recommend putting the Tower Skirt on a flat surface with spray adhesive. I did that, and attached the Nozzles with 5-minute epoxy.

    m_IMG_4072small.jpg
     
  20. Mar 10, 2019 #170

    Crawf56

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    Next, you are supposed to 'tack' the Tower Legs into position on the Skirt. However, since I am using epoxy, I think I am better off attaching the Legs, Skirt, and Capsule at the same time.

    There are good support holes for the Legs in the Capsule, that can hold the Legs while the Skirt is set in position at top. Or this may be a bad idea. We shall see. :confused:
     
  21. Mar 11, 2019 #171

    Crawf56

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    Well, here is my plan. Assembling the Tower Skirt, Legs, and Capsule. By the way, Estes recommends that you may not WANT to launch with the Tower Jet.

    So, this may be a bad idea. (Not my first one. ;))

    m_IMG_4073small.jpg
     
  22. Mar 11, 2019 #172

    Crawf56

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    By the way, Leg orientation is important.

    m_IMG_4074small.jpg
     
  23. Mar 14, 2019 at 2:29 AM #173

    Crawf56

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    Almost finished with the Tower Jet. Adding reinforcing epoxy, and will paint.

    m_IMG_4077small.jpg
     
  24. Mar 15, 2019 at 2:50 AM #174

    Crawf56

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    By the way, looking back through the instructions, I saw where the projected altitude for the Estes Saturn V with a D12-3 engine was 150 ft. :confused::confused::confused:
     
  25. Mar 17, 2019 at 1:39 AM #175

    Crawf56

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    Well, an interesting day. Did CG test (rocket on a string, balanced, swinging around) on the Saturn V, with an E15-4W motor in the rocket. And.....it was unstable. :confused:

    I could not find a location for the Center of Gravity in the instructions. So, added a washer to the nose (9 grams), got a good test.

    I found the CG to be 15-3/4 inches from the base of the Main Body Tube.

    NOTE: The pic is from the initial test. The string location shown is about 1 inch below the final location.

    m_IMG_0116small.jpg
     
  26. Mar 17, 2019 at 1:40 AM #176

    Crawf56

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    The E15-4W motor was 48 grams.

    The D12-3 was 46 grams.
     
  27. Mar 17, 2019 at 2:19 AM #177

    SecondRow

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    I’m curious: how many pats of clay did you add into the capsule? On mine, the instructions called for 2 pats but the kit came with 4. I emailed Estes to double check and was told to use 2. My first launch on an E-15 was squirrely. I’ve since added nose weight but haven’t had a chance to fly it. Wish I’d used all 4 when I built it.
     
  28. Mar 18, 2019 at 2:15 AM #178

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    This kit came off ebay, and had no clay. There is no CG information in the instructions, and no mention of nose weight. :confused:

    [Remember: This is the #2157 kit; not the current #1969.]

    I added a steel washer that weighed 9 grams. It is located in the Capsule.
     
  29. Mar 18, 2019 at 2:26 AM #179

    SecondRow

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    Yes, I have the 2157 as well, but it’s the later production run. Maybe the older 2157 kits didn’t have clay? Here are my instructions. Step 1 of “assemble capsule” is to put 2 pats of clay in the capsule.
    image.jpg image.jpg
     
  30. Mar 18, 2019 at 2:37 AM #180

    kuririn

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    The older 2157s had only one recommended engine: the D12. So no clay weight was needed to fly stable.
    Later 2157s had three recommended engines: D12-3, E12-4, and E30-4. The heavier motors moved the CG back, so I'm guessing that's why the instructions then recommended two pats of clay.
     

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